My multitouch screen is responsive. I don't think I have any problems with it. Maybe the drivers improved? I'm guessing it will be the same screen if it's still 2 finger. If anything the only lag I experience would be from normal computer slowness.

The accuracy is good, but there is the problem that your finger is just a lot bigger than a point. I find that I miss what I'm aiming for because a different part of my finger touches the screen than what I expect, which isn't a fault of the hardware. Not to mention, your finger covers up what you're pointing at which makes it harder to aim. Plus the fact that pc apps just aren't designed for touch input so most buttons are just really small. But something like a normal button is totally touchable.

Even still, I really like the multitouch because I just use it way more often than the pen. The convenience of not having to take out the pen is great. Windows 7 also has a great feature that you can touch scroll on any windows native navigational box with a scroll bar. Not a good enough feature to convince me to use IE though. Instead there's a firefox plugin called grab and drag. I would use that even with just mouse input. It even has throw physics which feels awesome while scrolling a page. I also have an extension so I can drag a link let go anywhere and open it in a new tab that way so I don't have to press any control modifiers. Windows also implements a feature called flicks where you can make a flicking motion and do some hotkey functions like back or forward, copy paste, etc.

The only problem I found is that the pen and touch drivers are bundled, which means you can't install the wacom pen driver without disabling multi touch, and you need the wacom pen driver to get pen pressure to work in photoshop. That's more of an Adobe problem though because they're responsible for getting their program to work with relevant hardware. Pressure works fine with other programs so I wouldn't blame the computer company. They could debundle the drivers though so you could have a wacom pen driver with a lenovo multitouch driver.